Update firewall-yaml test fixture

tests/modules/net_vpc_firewall_yaml/fixture/main.tf

@@ -18,6 +18,8 @@ module "firewall" {
   source     = "../../../../modules/net-vpc-firewall-yaml"
   project_id = "my-project"
   network    = "my-network"
-  config_path = "./rules"
+  config_directories = [
+    "./rules"
+  ]
   log_config = var.log_config
 }